How California’s Rule 21 inverter requirements expand grid capacity, limit energy (revenue) generation

A multi-year effort has been ongoing in California to update technical requirements for connecting Distributed Energy Resources (DER) to the grid, known as Rule 21. The experience of Germany was cited as one reason to take action. In Germany, significant grid destabilization problems arose when high penetration levels of solar … Continue reading How California’s Rule 21 inverter requirements expand grid capacity, limit energy (revenue) generation